Lateral resistance of mass timber shear wall connected by withdrawal-type connectors

Sung-Jun Pang,Jung-Kwon Oh,Seog Goo Kang,Kyung-Sun Ahn

doi:10.1186/s10086-021-01967-7

Abstract

In this study, the lateral resistances of mass timber shear walls were investigated for seismic design. The lateral resistances were predicted by kinematic models with mechanical properties of connectors, and compared with experimental data. Four out of 7 shear wall specimens consisted of a single Ply-lam panel and withdrawal-type connectors. Three out of 7 shear wall specimens consisted of two panels made by dividing a single panel in half. The divided panels were connected by 2 or 4 connectors like a single panel before being divided. The applied vertical load was 0, 24, or 120 kN, and the number of connectors for connecting the Ply-lam wall-to-floor was 2 or 4. As a result, the tested data were 6.3 to 52.7% higher than the predicted value by kinematic models, and it means that the lateral resistance can be designed by the behavior of the connector, and the prediction will be safe. The effects of wall-to-wall connectors, wall-to-floor connectors and vertical loads on the shear wall were analyzed with the experimental data.

Highlights

Mass timber panels such as cross-laminated timber (CLT), nail-laminated timber (NLT), and mass plywood panels (MPP) has been used for low-carbon design as an alternative to concrete and steel [1]
This study aimed to develop a design method for a Ply-lam shear wall connected with withdrawal-type connectors
The bearing failure was more pronounced in the specimens with high lateral resistance, this indicates that the bearing stiffness of the floor affected the rotational stiffness of the shear wall

Summary

Introduction

Mass timber panels such as cross-laminated timber (CLT), nail-laminated timber (NLT), and mass plywood panels (MPP) has been used for low-carbon design as an alternative to concrete and steel [1]. Hybrid CLTs using alternative materials (plywood, oriented strand board, laminated strand lumber, or hardwood) as layers of the CLT have been reported to improve the performance and cost competitiveness [2,3,4,5,6]. A panel composed of solid wood and plywood lamina is called a Ply-lam (Fig. 1). Plywood panels were used in cross-layer and have advantages in terms of production cost because the price of plywood is often lower than solid wood. The structural characteristics of Ply-lam under out-of-plane bending and the

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Results

Conclusion